| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package java.net; |
| |
| import java.io.UnsupportedEncodingException; |
| |
| /** |
| * This class is used to encode a string using the format required by |
| * {@code application/x-www-form-urlencoded} MIME content type. |
| */ |
| public class URLEncoder { |
| |
| static final String digits = "0123456789ABCDEF"; //$NON-NLS-1$ |
| |
| /** |
| * Prevents this class from being instantiated. |
| */ |
| private URLEncoder() { |
| } |
| |
| /** |
| * Encodes a given string {@code s} in a x-www-form-urlencoded string using |
| * the specified encoding scheme {@code enc}. |
| * <p> |
| * All characters except letters ('a'..'z', 'A'..'Z') and numbers ('0'..'9') |
| * and characters '.', '-', '*', '_' are converted into their hexadecimal |
| * value prepended by '%'. For example: '#' -> %23. In addition, spaces are |
| * substituted by '+' |
| * |
| * @param s |
| * the string to be encoded. |
| * @return the encoded string. |
| * @deprecated use {@link #encode(String, String)} instead. |
| */ |
| @Deprecated |
| public static String encode(String s) { |
| // Guess a bit bigger for encoded form |
| StringBuilder buf = new StringBuilder(s.length() + 16); |
| for (int i = 0; i < s.length(); i++) { |
| char ch = s.charAt(i); |
| if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') |
| || (ch >= '0' && ch <= '9') || ".-*_".indexOf(ch) > -1) { //$NON-NLS-1$ |
| buf.append(ch); |
| } else if (ch == ' ') { |
| buf.append('+'); |
| } else { |
| byte[] bytes = new String(new char[] { ch }).getBytes(); |
| for (int j = 0; j < bytes.length; j++) { |
| buf.append('%'); |
| buf.append(digits.charAt((bytes[j] & 0xf0) >> 4)); |
| buf.append(digits.charAt(bytes[j] & 0xf)); |
| } |
| } |
| } |
| return buf.toString(); |
| } |
| |
| /** |
| * Encodes the given string {@code s} in a x-www-form-urlencoded string |
| * using the specified encoding scheme {@code enc}. |
| * <p> |
| * All characters except letters ('a'..'z', 'A'..'Z') and numbers ('0'..'9') |
| * and characters '.', '-', '*', '_' are converted into their hexadecimal |
| * value prepended by '%'. For example: '#' -> %23. In addition, spaces are |
| * substituted by '+' |
| * |
| * @param s |
| * the string to be encoded. |
| * @param enc |
| * the encoding scheme to be used. |
| * @return the encoded string. |
| * @throws UnsupportedEncodingException |
| * if the specified encoding scheme is invalid. |
| */ |
| public static String encode(String s, String enc) |
| throws UnsupportedEncodingException { |
| |
| if (s == null || enc == null) { |
| throw new NullPointerException(); |
| } |
| // check for UnsupportedEncodingException |
| "".getBytes(enc); //$NON-NLS-1$ |
| |
| // Guess a bit bigger for encoded form |
| StringBuffer buf = new StringBuffer(s.length() + 16); |
| int start = -1; |
| for (int i = 0; i < s.length(); i++) { |
| char ch = s.charAt(i); |
| if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') |
| || (ch >= '0' && ch <= '9') || " .-*_".indexOf(ch) > -1) { //$NON-NLS-1$ |
| if (start >= 0) { |
| convert(s.substring(start, i), buf, enc); |
| start = -1; |
| } |
| if (ch != ' ') { |
| buf.append(ch); |
| } else { |
| buf.append('+'); |
| } |
| } else { |
| if (start < 0) { |
| start = i; |
| } |
| } |
| } |
| if (start >= 0) { |
| convert(s.substring(start, s.length()), buf, enc); |
| } |
| return buf.toString(); |
| } |
| |
| private static void convert(String s, StringBuffer buf, String enc) |
| throws UnsupportedEncodingException { |
| byte[] bytes = s.getBytes(enc); |
| for (int j = 0; j < bytes.length; j++) { |
| buf.append('%'); |
| buf.append(digits.charAt((bytes[j] & 0xf0) >> 4)); |
| buf.append(digits.charAt(bytes[j] & 0xf)); |
| } |
| } |
| } |